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Finding the Fourth Proportional to 133,079.80, 199,485.30 and 66,417.40

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Solution

The fourth proportional to 133,079.80, 199,485.30 and 66,417.40 is: 99,559.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,079.80 : 199,485.30 = 66,417.40 : x
  2. Step 2: Convert to fraction form
    133,079.80/199,485.30 = 66,417.40/x
  3. Step 3: Cross multiply
    133,079.80x = 199,485.30 × 66,417.40
  4. Step 4: Simplify right side
    133,079.80x = 13,249,294,964.22
  5. Step 5: Solve for x
    x = 13,249,294,964.22/133,079.80
  6. Step 6: Final answer
    x = 99,559.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.